As was said before, no one is perfect.
Midwest has been great for me. I bought (probably) the same budget kegging setup the OP did. Sure, the pressure creeps a little bit. The regs will probably be relegated to a mobile keg setup eventually. Most importantly, they were cheap...and Midwest stood behind them.
I ordered a second regulator from them. SWMBO stopped in their store to pick up the nipple I needed and I spent 10 minutes on the phone with one of the floor guys, eventually realizing I had purchased the wrong regulator. Next time I was in the store, they exchanged the reg, got me the correct nipple and took me to the back of the store to put it together and leak test it for me. In the process, (somehow) one of the regulators died during assembly. They grabbed another one off the shelf, no questions asked, and put it together for me.
So far the only complaints I have of Midwest:
If you're in the store, it's hard to talk to someone because they're always so busy.
The crush on their big mill is a bit coarse for my liking.
It's tough to find stuff in a store when you don't have a search bar walking around with you.
Other than that, I wish more of my shopping experiences were like the ones I have with Midwest.